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    <title>Document</title>
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    <script>
        /* 
        promise.resolve:
            默认返回一个成功的promise实例,值是resolve接收的实参,快速把一个值包装成promise实例
            如果参数是一个promise实例,则resolve的返回值和这个实例保持一致
        */
        const p1 =Promise.resolve(1)
        console.log('p1',p1);
        const p2 = Promise.resolve(new Promise((resolve,reject)=>{
            reject('22')
        }))
        console.log('p2',p2);
    </script>
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